CN105036659A - Nanometer and micrometer modified gel material - Google Patents
Nanometer and micrometer modified gel material Download PDFInfo
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- CN105036659A CN105036659A CN201510466332.3A CN201510466332A CN105036659A CN 105036659 A CN105036659 A CN 105036659A CN 201510466332 A CN201510466332 A CN 201510466332A CN 105036659 A CN105036659 A CN 105036659A
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- cement
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- gel material
- silicon ash
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention relates to a nanometer and micrometer modified gel material. The nanometer and micrometer modified gel material is composed of, by mass, 34-58% of cement, 8-15% of modified cement, 30-40% of high-quality grade-I coal ash, 3-7% of modified silica fume and 1-4% of high-dispersion enhancer. The nanometer and micrometer modified gel material has the advantages that the cement is delayed by introducing a surface modification agent so that the cement can be easily dispersed and holes of cement paste can be filled with the cement, the cement paste can be more compact, the cement paste strength is improved, and the overall gel effect of the cement paste is brought into fully play; nanometer and micrometer powder is introduced to modify the cement paste, and therefore the particle grading of the cement is greatly optimized, and strength is improved; meanwhile, dispersibility of nanometer and micrometer particles is improved through a physical chemistry method, and therefore it is ensured that the powder can not be agglomerated in the mixing process; pulverized fuel ash is introduced, cost can be greatly reduced, mobility of the cement paste is improved, and meanwhile the long-term strength can be improved.
Description
Technical field
The invention belongs to building material field, be specifically related to one and receive a micron modified adhesive gel material.
Background technology
Along with the modernization of industrial technology and the development of scientific research, applying of nanotechnology brings unprecedented development space to all conglomeraties.Nowadays, the researchist of many countries is conceived to, by mixing superfine powder and adopting new moulding process and control microtexture, improve the mechanical property of cement-based material, thus prepare high performance concrete already.Adding of superfine powder, the hole of cement-based material inside can be filled in, make the internal structure of Behavior of Hardened Cement Paste more closely knit, thus improve the intensity of Behavior of Hardened Cement Paste; Simultaneously because its particle size is little, specific surface energy is large, has very strong chemically reactive, can participate directly in the aquation of cement, with the Ca (OH) in hydrated product
2there is secondary reaction of hydration, promote the early hydration of cement, and then improve the intensity, particularly early strength of cement-based material; And because sub-micron-powder is little, surfactivity key is more, in the process of hydrated cementitious, the nucleus of hydrolysis product of cement can be served as, make hydrated product directly in the surface growth of nano particle, form the crystallization of hydrated product, thus make loosely organized C-S-H gel originally become very fine and close network-like structure.At present, the nano material be most widely used in cement-based material mainly contains Nano-meter SiO_2
2, nanometer Al
2o
3, nanometer Fe
2o
3, Nano-meter CaCO3
3with carbon nanotube etc., and micron order material mainly contains silicon ash, super finely ground slag, superfined flyash etc.
Patent CN102199021A discloses a kind of nano-material composite concrete with super high performance, it is characterized in that 1m
3containing cement 380-420kg, fine aggregate 680-740kg, coarse aggregate 1120-1190kg, water 130-160kg, flyash 50-75kg in concrete, silicon ash 25-64kg, high-performance water reducing agent 6.1-10.4kg, multi-walled carbon nano-tubes 0.05-0.25kg, Nano-meter SiO_2
215-25kg.Preparation technology is mechanical stirring, churning time 180-240 second, and dispersion agent is cetyl trimethylammonium bromide (C16TAB) (dispersion liquid allocation ratio MWNTs:C16TAB: water=0.48g:4.10g:40ml).This invention improves mechanics and the weather resistance of high performance concrete, significantly adds the working life of high performance concrete, can be used for the engineering that large-scale bridge spanning the sea etc. is higher to concrete material performance requriements.But do not consider in this patent how silicon ash evenly spreads in concrete, in use there is silicon ash agglomeration traits unavoidably.
Although improve concrete properties by superfine powder at present, existing large quantity research, major part research is all confined to play its filling effect and chemically reactive etc. by mixing ultrafine powder, thus improves intensity, but ignores the utilization ratio of cement itself.Research shows, because cement granules grating is unreasonable, cause having the cement of 25% to fail complete aquation nearly, this part cement has only played filling effect, does not play pectisation, inhibits concrete strength development, causes mass energy waste.Therefore, need to research and develop an a kind of novel micron modified adhesive gel material of receiving, giving full play under cement cementitious effect, introduce and receive micro-powder and carry out modification, thus significantly improve concrete properties, reach the effect of energy-saving and emission-reduction simultaneously.
Summary of the invention
Technical problem to be solved by this invention is the deficiency existed for above-mentioned prior art, one is provided to receive a micron modified adhesive gel material, it can improve concrete interface zone of transition intensity, makes concrete structure finer and close, thus significantly improves concrete strength and weather resistance.
The present invention solves the problems of the technologies described above adopted technical scheme: one receives a micron modified adhesive gel material, its component and mass percentage as follows: cement is 34% ~ 58%, modified cement is 8% ~ 15%, high-quality I level flyash is 30% ~ 40%, modified silicon ash is 3% ~ 7%, and high dispersive toughener is 1% ~ 4%.
By such scheme, cement is common 42.5 grades of silicate cements; Modified cement is the specific surface area obtained after physical and chemical modified by common 42.5 grades of silicate cements is 400 ~ 600m
2/ kg, D50 are the cement with high gelation efficiency of 5 ~ 10 μm, its concrete preparation technology is: common 42.5 grades of silicate cements are put into ball mill, be that the surface-modifying agent of silicate cement 1% puts into vapor phase growing apparatus by quality, in mechanical milling process, be sprayed onto cement surface, grinding 20min.
By such scheme, described surface modifying agent component is tri-isopropanolamine 20 ~ 30%, molasses 30 ~ 40%, water 30 ~ 50%.
By such scheme, described modified silicon ash is: be 0.1 ~ 0.3um, SiO by median size
2the silicon ash of content > 92% is added to the water, and wherein mass ratio is silicon ash: water=1:2, adds Sodium hexametaphosphate 99 simultaneously, and its add-on is 0.1% of silicon ash quality, stirs, then ultrasonic oscillation 5min.
By such scheme, described high dispersive toughener is: be the Nano-meter SiO_2 of 30 ± 5nm by particle diameter
2join in KH-570 silane coupling agent and stir, wherein, mass ratio is Nano-meter SiO_2
2: KH-570 silane coupling agent=1:2, then ultrasonic oscillation 5min.
The invention has the advantages that: (1) adopts rear technology of preparing, physical and chemical modified is carried out to Portland cement, cement granules particle diameter is reduced, introduce surface-modifying agent and delay cement due to the meticulous and too fast phenomenon of aquation that is that cause, make it be easy to disperse and be filled in cement slurry hole, making cement slurry finer and close, thus improving cement slurry intensity, not easily the coarse particles cement content of aquation reduces simultaneously, and the pectisation of cement entirety is given full play of.(2) introduce and receive micro-powder modification is carried out to cement slurry, significantly optimize cement granules grating, hole in further minimizing cement slurry, improve cement slurry compactness extent, thus raising intensity, adopt physicochemical manner to improve to receive the dispersiveness of micron particle simultaneously, ensure that powder can not be reunited in mixing process.(3) introduce flyash, significantly can reduce costs, and improve the mobility of cement slurry, simultaneously can improve later strength, and early strength adding due to silicon ash, its high reactivity compensate for the low shortcoming of flyash early activity.
Embodiment
Below in conjunction with specific examples, the present invention will be further described.
Embodiment 1
One receives a micron modified adhesive gel material, and take each raw material: Portland cement is 50%, modified cement is 15%, and high-quality first level flour coal ash is 30%, and modified silicon ash is 4%, and high dispersive toughener is 1%.Wherein, cement is common 42.5 grades of silicate cements; Modified cement is the specific surface area obtained after physical and chemical modified by common 42.5 grades of silicate cements is 600m
2/ kg, D50 are the cement with high gelation efficiency of 10 μm, its concrete preparation technology is: common 42.5 grades of silicate cements are put into ball mill, be that the surface-modifying agent of silicate cement 1% puts into vapor phase growing apparatus by quality, cement surface is sprayed onto in mechanical milling process, grinding 20min, described surface modifying agent component is tri-isopropanolamine 20%, molasses 30%, water 50%; Modified silicon ash is: be 0.1 ~ 0.3um, SiO by median size
2the silicon ash of content > 92% is added to the water, and wherein mass ratio is silicon ash: water=1:2, adds Sodium hexametaphosphate 99 simultaneously, and its add-on is 0.1% of silicon ash quality, stirs, then ultrasonic oscillation 5min; High dispersive toughener is: be the Nano-meter SiO_2 of 30 ± 5nm by particle diameter
2join in KH-570 silane coupling agent and stir, wherein, mass ratio is Nano-meter SiO_2
2: KH-570 silane coupling agent=1:2, then ultrasonic oscillation 5min.
Each experimental raw is taken: gelling material 360 by concrete mix; Medium sand 785; Rubble 1080; Water reducer 6.8; Water 165.
Strength test is carried out to the concrete obtained by experiment, the results are shown in Table 1.
Embodiment 2
One receives a micron modified adhesive gel material, and take each raw material: Portland cement is 45%, modified cement is 13%, and high-quality first level flour coal ash is 35%, and modified silicon ash is 6%, and high dispersive toughener is 1%.Wherein, cement is common 42.5 grades of silicate cements; Modified cement is the specific surface area obtained after physical and chemical modified by common 42.5 grades of silicate cements is 400m
2/ kg, D50 are the cement with high gelation efficiency of 5 μm, its concrete preparation technology is: common 42.5 grades of silicate cements are put into ball mill, be that the surface-modifying agent of silicate cement 1% puts into vapor phase growing apparatus by quality, cement surface is sprayed onto in mechanical milling process, grinding 20min, described surface modifying agent component is tri-isopropanolamine 30%, molasses 30%, water 40%; Modified silicon ash is: be 0.1 ~ 0.3um, SiO by median size
2the silicon ash of content > 92% is added to the water, and wherein mass ratio is silicon ash: water=1:2, adds Sodium hexametaphosphate 99 simultaneously, and its add-on is 0.1% of silicon ash quality, stirs, then ultrasonic oscillation 5min; High dispersive toughener is: be the Nano-meter SiO_2 of 30 ± 5nm by particle diameter
2join in KH-570 silane coupling agent and stir, wherein, mass ratio is Nano-meter SiO_2
2: KH-570 silane coupling agent=1:2, then ultrasonic oscillation 5min.
Each experimental raw is taken: gelling material 360 by concrete mix; Medium sand 785; Rubble 1080; Water reducer 6.8; Water 165.
Strength test is carried out to the concrete obtained by experiment, the results are shown in Table 1.
Embodiment 3
One receives a micron modified adhesive gel material, and take each raw material: Portland cement is 55%, modified cement is 8%, and high-quality first level flour coal ash is 30%, and modified silicon ash is 5%, and high dispersive toughener is 2%.Wherein, cement is common 42.5 grades of silicate cements; Modified cement is the specific surface area obtained after physical and chemical modified by common 42.5 grades of silicate cements is 550m
2/ kg, D50 are the cement with high gelation efficiency of 8 μm, its concrete preparation technology is: common 42.5 grades of silicate cements are put into ball mill, be that the surface-modifying agent of silicate cement 1% puts into vapor phase growing apparatus by quality, cement surface is sprayed onto in mechanical milling process, grinding 20min, described surface modifying agent component is tri-isopropanolamine 25%, molasses 35%, water 40%; Modified silicon ash is: be 0.1 ~ 0.3um, SiO by median size
2the silicon ash of content > 92% is added to the water, and wherein mass ratio is silicon ash: water=1:2, adds Sodium hexametaphosphate 99 simultaneously, and its add-on is 0.1% of silicon ash quality, stirs, then ultrasonic oscillation 5min; High dispersive toughener is: be the Nano-meter SiO_2 of 30 ± 5nm by particle diameter
2join in KH-570 silane coupling agent and stir, wherein, mass ratio is Nano-meter SiO_2
2: KH-570 silane coupling agent=1:2, then ultrasonic oscillation 5min.
Each experimental raw is taken: gelling material 360 by concrete mix; Medium sand 785; Rubble 1080; Water reducer 6.8; Water 165.
Strength test is carried out to the concrete obtained by experiment, the results are shown in Table 1.
Embodiment 4
One receives a micron modified adhesive gel material, and take each raw material: Portland cement is 44%, modified cement is 10%, and high-quality first level flour coal ash is 35%, and modified silicon ash is 7%, and high dispersive toughener is 4%, and wherein, cement is common 42.5 grades of silicate cements; Modified cement is the specific surface area obtained after physical and chemical modified by common 42.5 grades of silicate cements is 400m
2/ kg, D50 are the cement with high gelation efficiency of 10 μm, its concrete preparation technology is: common 42.5 grades of silicate cements are put into ball mill, be that the surface-modifying agent of silicate cement 1% puts into vapor phase growing apparatus by quality, cement surface is sprayed onto in mechanical milling process, grinding 20min, described surface modifying agent component is tri-isopropanolamine 30%, molasses 30, water 40%; Modified silicon ash is: be 0.1 ~ 0.3um, SiO by median size
2the silicon ash of content > 92% is added to the water, and wherein mass ratio is silicon ash: water=1:2, adds Sodium hexametaphosphate 99 simultaneously, and its add-on is 0.1% of silicon ash quality, stirs, then ultrasonic oscillation 5min; High dispersive toughener is: be the Nano-meter SiO_2 of 30 ± 5nm by particle diameter
2join in KH-570 silane coupling agent and stir, wherein, mass ratio is Nano-meter SiO_2
2: KH-570 silane coupling agent=1:2, then ultrasonic oscillation 5min.
Each experimental raw is taken: gelling material 360 by concrete mix; Medium sand 785; Rubble 1080; Water reducer 6.8; Water 165.
Strength test is carried out to the concrete obtained by experiment, the results are shown in Table 1.
The effect of table 1 embodiment product in concrete gathers
Claims (5)
1. receive a micron modified adhesive gel material, its component and mass percentage as follows: cement is 34% ~ 58%, and modified cement is 8% ~ 15%, high-quality I level flyash is 30% ~ 40%, and modified silicon ash is 3% ~ 7%, and high dispersive toughener is 1% ~ 4%.
2. a micron modified adhesive gel material of receiving according to claim 1, is characterized in that: cement is common 42.5 grades of silicate cements; Modified cement is the specific surface area obtained after physical and chemical modified by common 42.5 grades of silicate cements is 400 ~ 600m
2/ kg, D50 are the cement with high gelation efficiency of 5 ~ 10 μm, its concrete preparation technology is: common 42.5 grades of silicate cements are put into ball mill, be that the surface-modifying agent of silicate cement 1% puts into vapor phase growing apparatus by quality, in mechanical milling process, be sprayed onto cement surface, grinding 20min.
3. a micron modified adhesive gel material of receiving according to claim 2, is characterized in that: described surface modifying agent component is tri-isopropanolamine 20 ~ 30%, molasses 30 ~ 40%, water 30 ~ 50%.
4. a micron modified adhesive gel material of receiving according to claim 1, is characterized in that: described modified silicon ash is: be 0.1 ~ 0.3um, SiO by median size
2the silicon ash of content > 92% is added to the water, and wherein mass ratio is silicon ash: water=1:2, adds Sodium hexametaphosphate 99 simultaneously, and its add-on is 0.1% of silicon ash quality, stirs, then ultrasonic oscillation 5min.
5. a micron modified adhesive gel material of receiving according to claim 1, is characterized in that: described high dispersive toughener is: be the Nano-meter SiO_2 of 30 ± 5nm by particle diameter
2join in KH-570 silane coupling agent and stir, wherein, mass ratio is Nano-meter SiO_2
2: KH-570 silane coupling agent=1:2, then ultrasonic oscillation 5min.
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|---|---|---|---|
| CN201510466332.3A CN105036659A (en) | 2015-07-31 | 2015-07-31 | Nanometer and micrometer modified gel material |
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| CN201510466332.3A CN105036659A (en) | 2015-07-31 | 2015-07-31 | Nanometer and micrometer modified gel material |
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Cited By (6)
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| CN105693164A (en) * | 2016-01-22 | 2016-06-22 | 东南大学 | Aminosilane-modified ecological nano cementing material and preparation method thereof |
| CN105776991A (en) * | 2015-12-23 | 2016-07-20 | 东南大学 | Modified ecological cementing nano-material and preparation method therefor |
| CN106116242A (en) * | 2016-06-27 | 2016-11-16 | 江苏中铁奥莱特新材料股份有限公司 | A kind of special defoamer of PHC tubular pile concrete |
| CN110642550A (en) * | 2019-10-10 | 2020-01-03 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Composite microsphere for improving early performance of cement-based material |
| CN113816642A (en) * | 2021-09-16 | 2021-12-21 | 中建西部建设新疆有限公司 | Silica powder-based concrete powdery synergist and preparation method and application thereof |
| CN115477496A (en) * | 2022-08-31 | 2022-12-16 | 江苏百瑞吉新材料有限公司 | Concrete anti-cracking additive and preparation method and application thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105776991A (en) * | 2015-12-23 | 2016-07-20 | 东南大学 | Modified ecological cementing nano-material and preparation method therefor |
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| CN110642550A (en) * | 2019-10-10 | 2020-01-03 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Composite microsphere for improving early performance of cement-based material |
| CN113816642A (en) * | 2021-09-16 | 2021-12-21 | 中建西部建设新疆有限公司 | Silica powder-based concrete powdery synergist and preparation method and application thereof |
| CN115477496A (en) * | 2022-08-31 | 2022-12-16 | 江苏百瑞吉新材料有限公司 | Concrete anti-cracking additive and preparation method and application thereof |
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